摘要
采用温室盆栽与田间试验研究甘肃省高寒阴湿区黄绵土养分状况。结果表明,盆栽诊断黄绵土缺N、P、S和Zn,未表现缺B、Cu和Mn,Fe和Mo元素充足,N、P肥为大田该黄绵土种植油菜的主要限制因子,其次为S、B和Zn,土壤中不缺K,OPT中氮量适中。与OPT相比,减N、P、S、B和Zn油菜分别减产24.5%、27.1%、13.5%、16.8%和8.8%,而增加N用量则产量降低12.2%。推荐施肥N、P2O5、S、B、Zn分别为90、90、105、3.75、3.75kg·hm-2。盆栽诊断与大田平衡施肥间有很好的相关性,可用来指导大田试验。
In this paper, with the pot experiment and field experiment, the status of nutrients of Lo essal soil at chilling and humid region of highelevation in Gansu Province is studied. The results show that the limiting nutrients of Loessal soil are the deficiency of N, P, S and Zn, the soil has no defi ciency of B,Cu and Mn, enough amount Fe and Mo. In field experiment, the main limiting nutrients are N and P fertilizers, secondly are S, 13 and Zn, the soil has enough amount K, OPT are suitable of N. Based on the treatment of OPT. Non application of N, P, S, B and Zn fertilizers can reduce the yield of the doublelow rapeseed prominently and the decreasing amplitudes are 24.5%, 27.1%, 13. 5%, 16.8%and 8.8% respectively. While increasing the N application decreases the yield and the de creasing amplitude is 12.2%. The recommendatory fertilizer dosage of loessal soil is N 90 kg . hm2 , P205 90kg, hm2, S105 kg hm2, B3.75 kg.hm2 andZn3.75 kg.hm2 respectively. There is a good correlation between potted diagnosis and field experiment, and it can be used to guide field tri als.
出处
《西北农业学报》
CAS
CSCD
北大核心
2014年第1期126-131,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
甘肃省自然科学基金项目(3ZS061-A25-066)
PPI/PPIC项目(Gansu200202)
关键词
黄绵
营养诊断
低油菜
平衡施肥
Loessal soil
Nutrition diagnosis
Double-low rapeseed
Balancing fertilizer